anooshkhalid/why-encrypt

Java and PHP classes used to encrypt and decrypt strings with a private key, or any key scheme that you create, and pass data between PHP and Java clients or servers.

Java Dependencies

Apache Commons Coded

iOS Usage

In the arc project, you have to add the -fno-objc-arc in the build phases.
Encrypt and Decrypt in this way:

NSString *encStr = [AESTool encryptData:@"hello" withKey:@"1234567890123456"];
NSLog(@"%@", encStr);

Tips

While you send a POST or GET request with data using the AES encrypt, the + will replaced by ' '.To solve this this problem, you can do like this to replace the + with -:

public static String encrypt(String input, String key) {
    byte[] crypted = null;
    try {
        SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skey);
        crypted = cipher.doFinal(input.getBytes());
    } catch (Exception e) {
        System.out.println(e.toString());
    }
    String result = new String(Base64.encodeBase64(crypted));
    return result.replace("+", "-");

}

public static String decrypt(String input, String key) {
    input = input.replace("-", "+");
    byte[] output = null;
    try {
        SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, skey);
        output = cipher.doFinal(Base64.decodeBase64(input));
    } catch (Exception e) {
        System.out.println("after encrypt : "+ e.toString());
    }
    return new String(output);
}

public function encrypt($input, $key) 
{
    $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB); 
    $input = $this->pkcs5_pad($input, $size); 
    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, ''); 
    $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND); 
    mcrypt_generic_init($td, $key, $iv); 
    $data = mcrypt_generic($td, $input); 
    mcrypt_generic_deinit($td); 
    mcrypt_module_close($td); 
    $data = base64_encode($data);
    $data = str_replace("+","-",$data);
    return $data; 
} 
public function decrypt($sStr, $sKey) {
    $sStr = str_replace("-","+",$sStr);
    $decrypted= mcrypt_decrypt(
        MCRYPT_RIJNDAEL_128,
        $sKey, 
        base64_decode($sStr), 
        MCRYPT_MODE_ECB
    );
    $dec_s = strlen($decrypted); 
    $padding = ord($decrypted[$dec_s-1]); 
    $decrypted = substr($decrypted, 0, -$padding);
    return $decrypted;
}

Steven Holder http://stevenholder.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

anooshkhalid / why-encrypt

About

Languages